<template>
  <div class="add">
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

        <!-- <Breadcrumb /> -->

    <el-card>
      <el-alert
        show-icon
        center
        :closable="false"
        title="添加商品信息"
        type="info"
      >
      </el-alert>

      <el-steps :active="activeIdx - 0" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <el-form
        :model="addForm"
        :rules="addrules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="'left'"
          v-model="activeIdx"
          :before-leave="backTabs"
          @tab-click="tabClick"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                expandTrigger="hover"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyData"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品图片" name="3">
            <!--action 图片要上传的 api 地址  -->
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="gotSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="addBtn" @click="addGoods"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <el-dialog title="图片预览" :visible.sync="showImg" width="50%">
      <img :src="previewPath" alt="" class="preImg" />
    </el-dialog>
  </div>
</template>

<script>
import _ from "lodash";
import Breadcrumb from "../breadcrumb.vue";
export default {
  created() {
    this.getCateList();
  },
  components:{
    Breadcrumb
  },
  data() {
    return {
      activeIdx: "0",
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        //商品所属的分类数组
        goods_cat: [],
        // 图片的数组
        pics: [],
        // 商品的详情描述
        goods_introduce: "",
        attrs: [],
      },
      addrules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" },
        ],
      },
      cateList: [],
      cateProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
      },
      manyData: [],
      onlyData: [],
      uploadUrl: "http://127.0.0.1:8888/api/private/v1/upload",
      // 图片上传的请求头
      headerObj: {
        Authorization: window.sessionStorage.getItem("token"),
      },
      previewPath: "",
      showImg: false,
    };
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) return this.$message.error("获取数据失败");
      this.cateList = res.data;
    },
    // 级联选择框的切换选择项
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    // 切换标签页之前的监听函数，对数据做判断
    backTabs(activeName, oldActiveName) {
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message({
          message: "请先选择商品分类",
          duration: 300,
          type: "error",
        });
        return false;
      }
    },
    async tabClick() {
      if (this.activeIdx === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: "many" } }
        );
        if (res.meta.status !== 200) return this.$message.error("获取数据失败");
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
          (" ");
        });
        this.manyData = res.data;
      } else if (this.activeIdx === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: "only" } }
        );
        if (res.meta.status !== 200) return this.$message.error("获取数据失败");

        this.onlyData = res.data;
      }
    },
    // 移除图片
    handleRemove(file, fileList) {
      // 获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path;
      //从 pics数组中,找到这个图片对应的索引值
      const idx = this.addForm.pics.findIndex((i) => i.pic === filePath);
      // 调用数组的 splice 方法, 吧图片信息对象，从pics中移除
      this.addForm.pics.splice(idx, 1);
      console.log(this.addForm.pics);
    },
    //图片预览
    handlePreview(file) {
      this.previewPath = file.response.data.url;
      this.showImg = true;
    },
    // 图片上传成功的函数
    gotSuccess(response) {
      // 拼接得到一个图片信息对象
      const picInfo = {
        pic: response.data.tmp_path,
      };
      // 将图片信息对象 push 到 pics 中
      this.addForm.pics.push(picInfo);
    },
    addGoods() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return this.$message.error("请填写必要的表单项");
        }

        // 深拷贝 addform, 就不会影响 前面的数据了
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(",");

        this.manyData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(" "),
          };
          this.addForm.attrs.push(newInfo);
        });

        this.onlyData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join,
          };
          this.addForm.attrs.push(newInfo);
        });

        form.attrs = this.addForm.attrs;
        // 添加的商品名称必须是唯一的
        const { data: res } = await this.$http.post("goods", form);
        if (res.meta.status !== 201) return this.$message.error("添加商品失败");
        this.$message.success("添加成功！");
        this.$router.push("/goods");
      });
    },
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
};
</script>

<style lang="scss" scoped>
.add {
  .el-card {
    margin: 20px 0;
    .el-step {
      margin: 20px 0;
    }
    .el-checkbox {
      margin: 0 10px 0 0 !important;
    }
    .preImg {
      width: 100%;
    }
    .addBtn {
      margin-top: 20px;
    }
  }
}
</style>